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Wire gauge calculator

AWG chart

Wire gauge calculation

Wire gauge calculator

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Note: 68°F or 20°C, the results may differ in reality: as it depends on the resistivity of the material used and the number of strands in a single wire.

AWG Chart

Look up the following values in the AWG Chart, catch now!

AWG

Diameter
(inch)

Diameter
(mm)

Area
(kcmil)

Area
(mm2)

0000 (4/0)

0.4600

11.6840

211.6000

107.2193

000 (3/0)

0.4096

10.4049

167.8064

85.0288

00 (2/0)

0.3648

9.2658

133.0765

67.4309

0 (1/0)

0.3249

8.2515

105.5345

53.4751

1

0.2893

7.3481

83.6927

42.4077

2

0.2576

6.5437

66.3713

33.6308

3

0.2294

5.8273

52.6348

26.6705

4

0.2043

5.1894

41.7413

21.1506

5

0.1819

4.6213

33.1024

16.7732

6

0.1620

4.1154

26.2514

13.3018

7

0.1443

3.6649

20.8183

10.5488

8

0.1285

3.2636

16.5097

8.3656

9

0.1144

2.9064

13.0927

6.6342

10

0.1019

2.5882

10.3830

5.2612

11

0.0907

2.3048

8.2341

4.1723

12

0.0808

2.0525

6.5299

3.3088

13

0.0720

1.8278

5.1785

2.6240

14

0.0641

1.6277

4.1067

2.0809

15

0.0571

1.4495

3.2568

1.6502

16

0.0508

1.2908

2.5827

1.3087

17

0.0453

1.1495

2.0482

1.0378

18

0.0403

1.0237

1.6243

0.8230

19

0.0359

0.9116

1.2881

0.6527

20

0.0320

0.8118

1.0215

0.5176

21

0.0285

0.7229

0.8101

0.4105

22

0.0253

0.6438

0.6424

0.3255

23

0.0226

0.5733

0.5095

0.2582

24

0.0201

0.5106

0.4040

0.2047

25

0.0179

0.4547

0.3204

0.1624

26

0.0159

0.4049

0.2541

0.1288

27

0.0142

0.3606

0.2015

0.1021

28

0.0126

0.3211

0.1598

0.0810

29

0.0113

0.2859

0.1267

0.0642

30

0.0100

0.2546

0.1005

0.0509

31

0.0089

0.2268

0.0797

0.0404

32

0.0080

0.2019

0.0632

0.0320

33

0.0071

0.1798

0.0501

0.0254

34

0.0063

0.1601

0.0398

0.0201

35

0.0056

0.1426

0.0315

0.0160

36

0.0050

0.1270

0.0250

0.0127

37

0.0045

0.1131

0.0198

0.0100

38

0.0040

0.1007

0.0157

0.0080

39

0.0035

0.0897

0.0125

0.0063

40

0.0031

0.0799

0.0099

0.0050

Wire gauge calculations

Learn to make Wire Gauge Calculation here!

Wire diameter calculations

Let’s suppose the n gauge wire diameter dn measured in inches is equal to 0.005 inches times the 92 raised to the power of number 36 minus gauge n, and total divided by 39:

dn (in) = 0.005 in × 92(36-n)/39

And the n gauge wire diameter dn in measured in millimeters (mm) is equal to around 0.127 mm times the 92 raised to the power of number 36 minus gauge number n, and the total is divided by 39:

dn (mm) = 0.127 mm × 92(36-n)/39

Wire cross sectional area calculations

The number n gauge wire’s cross the sectional area An in the measure of kilo-circular mils (kcmil) is equal to around 1000 times the square wire diameter d in measure of inches (in):

An (kcmil) = 1000×dn2 = 0.025 in2 × 92(36-n)/19.5

The number n gauge wire’s cross sectional area An measured in square inches (in2) is totally equal to pi divided by the number 4 times the square wire diameter d measured in inches (in):

An (in2) = (π/4)×dn2 = 0.000019635 in2 × 92(36-n)/19.5

If the n number of gauge wire’s cross sectional area An measured in square millimeters (mm2) is totally equal to pi which is further divided by 4 times the actual square wire diameter d measured in millimeters (mm):

An (mm2) = (π/4)×dn2 = 0.012668 mm2 × 92(36-n)/19.5

Wire resistance calculations

The n number of gauge wire resistance R measured in ohms per kilofeet (Ω/kft) is totally equal to the 0.3048×1000000000 times the wire’s resistance ρ in ohm-meters (Ω·m) which is divided by 25.42 times the cross sectional area called An in square inches (in2):

Rn (Ω/kft) = 0.3048 × 109 × ρ(Ω·m) / (25.42 × An (in2))

Suppose the n gauge wire resistance R measured in ohms per kilometer (Ω/km) is equal to the 1000000000 times of the wire’s resistance ρ measured in ohm-meters (Ω·m) which is divided by the total cross sectional area An in the square millimeters (mm2):

SWG to mm conversion

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SWG to mm conversion calculator

SWG calculation

SWG to mm conversion chart

SWG to mm conversion calculator

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Wire cross sectional area calculation

Let’s assume that the n gauge wire with cross sectional area An in square millimeters (mm2) is totally equal to pi divided by the 4 times of the square of wire diameter d which is measured in millimeters (mm):

Voltage Drop Calculator

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Voltage drop calculator

Voltage drop calculation

Voltage Drop Calculator

Calculates Voltage Drop at 20 degree Celsius.

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Voltage drop calculations

DC / single phase calculation

Let’s Take the voltage drop V measured in volts (V) is totally equal to the wire current I measured in amps (A) times 2 times one way of the wire length L in feet (ft) times the resistance of the wire per 1000 feet R measured in ohms (Ω/kft) and divided by 1000:

Vdrop (V) = Iwire (A) × Rwire(Ω)

= Iwire (A) × (2 × L(ft) × Rwire(Ω/kft) / 1000(ft/kft)

The voltage drop V is equal to the wire current I in amps (A) multiplied twice the wire length L measured in meters (m) and further multiplied the wire resistance per 1000 meters R measured in ohms (Ω/km) and divided by 1000:

Vdrop (V) = Iwire (A) × Rwire(Ω)

= Iwire (A) × (2 × L(m) × Rwire (Ω/km) / 1000(m/km)

3 phase calculation

The voltage drop V in volts (V) is totally equal to the square root of the 3 times of the wire current I measured in amps (A) times the 1 way wire length L measured in feet (ft) times the resistance of wire per 1000 feet R measured in ohms (Ω/kft) and divided by 1000:

Vdrop (V) = √3 × Iwire (A) × Rwire (Ω)

= 1.732 × Iwire (A) × (L(ft) × Rwire (Ω/kft) / 1000(ft/kft))

The voltage drop V in volts (V) can be calculated as the square root of 3 times the wire current I which is measured in amps (A) times one way of the wire length L in meters (m) times the resistance of wire per 1000 meters R measured in ohms (Ω/km) and divided by 1000:

Vdrop (V) = √3 × Iwire (A) × Rwire (Ω)

= 1.732 × Iwire (A) × (L(m) × Rwire (Ω/km) / 1000(m/km))

Wire diameter calculations

Assume n number of gauge wire diameter dn in inches (in) is totally equal to 0.005 in times the 92 raised to the power of number 36 minus gauge number n, and finally divided by 39:

dn (in) = 0.005 in × 92(36-n)/39

The number n gauge wire diameter dn in millimeters (mm) is totally equal to the 0.127 mm times the 92 raised to the power of 36 minus the gauge number n, and divided by 39:

dn (mm) = 0.127 mm × 92(36-n)/39

Wire cross sectional area calculations

Let’s take n gauge wire with cross sectional area An measured in kilo-circular mils (kcmil) is totally equal to 1000 times the square wire diameter d measured in inches (in):

An (kcmil) = 1000×dn2 = 0.025 in2 × 92(36-n)/19.5

The number n gauge wire with cross sectional area An is measured in square inches (in2) is actually equal to pi divided by the 4 times of the square wire with diameter d measured in inches (in):

An (in2) = (π/4)×dn2 = 0.000019635 in2 × 92(36-n)/19.5

The n gauge wire’s cross sectional area An in square millimeters (mm2) is equal to pi divided by 4 times the square wire diameter d in millimeters (mm):

An (mm2) = (π/4)×dn2 = 0.012668 mm2 × 92(36-n)/19.5

Wire resistance calculations

Assume n gauge wire with resistance R which is measured in ohms per kilofeet (Ω/kft) is totally equal to the 0.3048×1000000000 times the resistivity of the wire ρ in ohm-meters (Ω·m) and further divided by 25.42 times the cross sectional area An which is measured in square inches (in2):

Rn (Ω/kft) = 0.3048 × 109 × ρ(Ω·m) / (25.42 × An (in2))

The n gauge resistance of the wire R in ohms per kilometer (Ω/km) is totally equal to 1000000000 times the resistivity of wire ρ which is measured in ohm-meters (Ω·m) divided by the cross sectional area An in square millimeters (mm2):

#2 Gauge Wire

Get #2 American Wiring Gauge (AWG) features here including; diameter, resistance and area.

#2 AWG diameter

#2 AWG resistance

#2 AWG area

#2 AWG wire diameter

The diameter of #2 AWG wire can be measured in inches with the following formula:

d2(inch) = 0.005 inch × 92 (36-2)/39 = 0.2576 inch

Diameter of #2 AWG wire in millimeters:

The Diameter of #2AWG wire can easily be measured in Millimeters with the following formula:

d2(mm) = 0.127 mm × 92 (36-2)/39 = 6.5437 mm

#2 AWG resistance

#2AWG Resistance can easily be found by the table provided below.

Wire
material

Resistivity
@20ºC
(Ω×m)

Resistance
per kilofeet
@20ºC
(Ω/kft)

Resistance
per kilometer
@20ºC
(Ω/km)

Carbon steel

1.43×10-7

1.2960

4.2521

Copper

1.72×10-8

0.1559

0.5114

Gold

2.44×10-8

0.2211

0.7255

Nickel

6.99×10-8

0.6335

2.0784

Nichrome

1.1×10-6

9.9694

32.7081

Silver

1.59×10-8

0.1441

0.4728

Nickel

6.99×10-8

0.6335

2.0784

Aluminum

2.82×10-8

0.2556

0.8385

Results may differ while dealing with real wires: as it depends on the resistance of the material used and also on the number of strands in wire.

Wire’s resistance per foot

Assume the n gauge wire resistance R measured in ohms per kilofeet (Ω/kft) can easily be calculated as it equal to 0.3048×1000000000 times the resistance of the wire ρ in ohm-meters (Ω·m) and it is divided by 25.42 times the cross sectional area An in the square inches (in2):

Rn (Ω/kft) = 0.3048 × 109 × ρ(Ω·m) / (25.42 × An (in2))

Resistance per meter

Let’s Calculate the n number of gauge wire resistance R measured in ohms per kilometer (Ω/km) can easily be calculated as it is equal to 1000000000 times the resistance of the wire ρ in ohm-meters (Ω·m) and it divided by the cross sectional area An which is measured in square millimeters (mm2):

Rn (Ω/km) = 109 × ρ(Ω·m) / An (mm2)

#2 AWG wire area

The area of #2 AWG wire can be calculated with this easy formula in kilo-circular mils:

An (kcmil) = 1000×dn2 = 1000×(0.2576 in)2 = 66.3713 kcmil

The area of #2 AWG wire in square inches:

Use this formula to calculate the area of #2 AWG wire in square inches:

A2(inch2) = (π/4)×dn2 = (π/4)×(0.2576 in)2 = 0.0521 inch2

The area of #2 AWG wire in square millimeters:

Use this simple formula to measure the area of #2AWG wire in square millimeters: